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    <title>zpch2</title>
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    <center>Scilab Function</center>
    <div align="right">Last update : April 1993</div>
    <p>
      <b>zpch2</b> -  Chebyshev analog filter</p>
    <h3>
      <font color="blue">Calling Sequence</font>
    </h3>
    <dl>
      <dd>
        <tt>[zeros,poles,gain]=zpch2(n,A,omegar)  </tt>
      </dd>
    </dl>
    <h3>
      <font color="blue">Parameters</font>
    </h3>
    <ul>
      <li>
        <tt>
          <b>n</b>
        </tt>: integer : filter order</li>
      <li>
        <tt>
          <b>A</b>
        </tt>: real : attenuation in stop band (<tt>
          <b>A&gt;1</b>
        </tt>)</li>
      <li>
        <tt>
          <b>omegar</b>
        </tt>: real : cut-off frequency in Hertz</li>
      <li>
        <tt>
          <b>zeros</b>
        </tt>: resulting filter zeros</li>
      <li>
        <tt>
          <b>poles</b>
        </tt>: resulting filter poles</li>
      <li>
        <tt>
          <b>gain</b>
        </tt>: Resulting filter gain</li>
    </ul>
    <h3>
      <font color="blue">Description</font>
    </h3>
    <p>
    Poles and zeros of a type 2 Chebyshev analog filter
    gain is the gain of the filter</p>
    <pre>

H(s)=gain*poly(zeros,'s')/poly(poles,'s')
   
    </pre>
    <h3>
      <font color="blue">Author</font>
    </h3>
    <p>F.D.  </p>
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